Acts 12:3-6

³And seeing that it pleased the Jews, he proceeded to apprehend Peter also; (then were the days of unleavened bread;)

⁴and he seized him and put him in prison, and delivered him to four quaternions of soldiers to keep him; intending after the passover to bring him forth to the people.

⁵Peter therefore was kept guarded in prison; but earnest prayer was made by the church to God in his behalf.

⁶And when Herod was about to bring him forth, on that night Peter was sleeping between two soldiers, bound with two chains, and keepers before the door were guarding the prison.